[PHOENIX-1902] Do not perform conflict detection for append-only tables

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Assignee: James R. Taylor
• Reporter: James R. Taylor
• Created: 21/Apr/15 21:26
• Updated: 04/Aug/15 23:48
• Resolved: 04/Aug/15 23:48

Description

When a table is declared as write-once/append-only (IMMUTABLE_ROWS=true), then we should disable the conflict detection being done by Tephra as there can be no conflicts. This is a much lighter weight model that relies on Tephra mainly to:

• filter rows for failed (and unabortable) transactions.
• not show transactional data until it has successfully been committed.